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would split the signal into two mirror images, feeding them to the "push-pull" power tubes. This created the massive current needed to move the air. How Amps Work - Rob Robinette's
, where a 1-Megaohm resistor stood like a gateway, setting the impedance to ensure the signal wouldn't lose its strength. The Preamp: The Sculptor The signal first met the preamplifier (preamp) . Think of the preamp as a sculptor. Its job was twofold: : It used a vacuum tube